Exercise bike



FIG. 1 is a front, right, and top perspective view of an exercise bike, showing my design.

FIG. 2 is a rear, left, and bottom perspective view thereof.

FIG. 3 is a front elevation view thereof.

FIG. 4 is a rear elevation view thereof.

FIG. 5 is a left side elevation view thereof.

FIG. 6 is a right side elevation view thereof.

FIG. 7 is a top plan view thereof.

FIG. 8 is a bottom plan view thereof.

FIG. 9 is a partial enlarged view of an area labeled 9 in FIG. 1 comprising a headstock.

FIG. 10 is a partial enlarged view of an area labeled 10 in FIG. 1 comprising a bracket.

FIG. 11 is a partial enlarged view of an area labeled 11 in FIG. 1 comprising an adjusting knob.

FIG. 12 is a partial enlarged view of an area labeled 12 in FIG. 1 comprising a foot pedal; and,

FIG. 13 is a partial enlarged view of an area labeled 13 in FIG. 2 comprising a brake pad.

The broken lines shown in the drawings are included for the purpose of illustrating portions of the exercise bike that form no part of the claimed design. 

CLAIM The ornamental design for an exercise bike, as shown and described. 